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55 inch LG OLED AI B4 4K Smart TV 2024
2.1 channel LG Soundbar for TV with Stereo Sound US40T
Summary

- Clearer sound and picture with refinements by the alpha 8 AI Processor 4K.
- Infinite Contrast for crisp visuals with dark blacks and bright whites.
- Enjoy upgrades for up to 5 years with webOS Re:New Program.
- Always ideal audio from AI Sound Pro.
- Immersive 2.1ch surround sound.
- Partial refund is not available.
Key Spec
PICTURE (DISPLAY) - Display Type
4K OLED
PICTURE (DISPLAY) - Refresh Rate
120Hz Native
PICTURE (DISPLAY) - Wide Colour Gamut
OLED Colour
PICTURE (PROCESSING) - Picture Processor
α8 AI Processor 4K
PICTURE (PROCESSING) - HDR (High Dynamic Range)
Dolby Vision / HDR10 / HLG
GAMING - G-Sync Compatible (Nvidia)
Yes
GAMING - FreeSync Compatible (AMD)
Yes
AUDIO - Audio Output
20W
AUDIO - Speaker System
2.0 channel
AUDIO - Dolby Atmos
Yes
DIMENSIONS AND WEIGHTS - TV Dimensions without Stand (WxHxD)
1228 x 708 x 45.9
DIMENSIONS AND WEIGHTS - TV Weight without Stand
14.3
All Spec
PICTURE (DISPLAY)
Display Type
4K OLED
Display Resolution
4K Ultra HD (3,840 x 2,160)
Refresh Rate
120Hz Native
Wide Colour Gamut
OLED Colour
PICTURE (PROCESSING)
AI Genre Selection
Yes (SDR/HDR)
AI Brightness Control
Yes
Picture Processor
α8 AI Processor 4K
HDR (High Dynamic Range)
Dolby Vision / HDR10 / HLG
AI Upscaling
α8 AI Super Upscaling 4K
FILMMAKER MODE™
Yes
Dynamic Tone Mapping
Yes (Dynamic Tone Mapping Pro)
HFR (High Frame Rate)
4K 120 fps (HDMI)
Picture Mode
10 modes (Personalized Picture Wizard, Vivid, Standard, APS(Auto Power Save), Cinema, Sports, Game, Filmmaker, (ISF)Expert(Bright Room), (ISF)Expert(Dark Room))
Dimming Technology
Pixel Dimming
Motion
OLED Motion
AI Picture Pro
Yes
Auto Calibration
Yes
GAMING
FreeSync Compatible (AMD)
Yes
HGIG Mode
Yes
Game Optimiser
Yes (Game Dashboard)
ALLM (Auto Low Latency Mode)
Yes
VRR (Variable Refresh Rate)
Yes
G-Sync Compatible (Nvidia)
Yes
Dolby Vision for Gaming (4K 120Hz)
Yes
Response Time
Less than 0.1ms
SMART TV
Operating System (OS)
webOS 24
ThinQ
Yes
USB Camera Compatible
Yes
Works with Apple Airplay2
Yes
Family Settings
Yes
Always Ready
Yes
Amazon Alexa
Yes (Built-in)
Full Web Browser
Yes
Home Hub
Yes
Intelligent Voice Recognition
Yes (supported languages vary by country - Danish, Dutch, English, French, German, Greek, Italian, Norwegian, Polish, Russian, Spanish, Swedish)
LG Channels
Yes
Magic Remote Control
Built-In
Multi View
Yes
Smartphone Remote App
Yes (LG ThinQ)
The security update is supported until
31/12/2028
Works with Apple Home
Yes
AUDIO
WiSA Ready
Yes (Up to 2.1 Channel)
LG Sound Sync
Yes
Sound Mode Share
Yes
Simultaneous Audio Output
Yes
Bluetooth Surround Ready
Yes (2 Way Playback)
Dolby Atmos
Yes
AI Sound
α8 AI Sound Pro (Virtual 9.1.2 Up-mix)
Clear Voice Pro
Yes (Auto Volume Leveling)
Audio Output
20W
AI Acoustic Tuning
Yes
Audio Codec
AC4, AC3(Dolby Digital), EAC3, HE-AAC, AAC, MP2, MP3, PCM, WMA, apt-X (Refer to manual)
Speaker Direction
Down Firing
Speaker System
2.0 channel
WOW Orchestra
Yes
CONNECTIVITY
SPDIF (Optical Digital Audio Out)
1ea
Simplink (HDMI CEC)
Yes
HDMI Audio Return Channel
eARC (HDMI 3)
Bluetooth Support
Yes (v 5.1)
Ethernet Input
1ea
HDMI Input
4ea (supports 4K 120Hz, eARC, VRR, ALLM, QMS (4 port))
CI Slot
1ea
RF Input (Antenna/Cable)
x2
USB Input
x2 (v 2.0)
Wi-Fi
Yes (Wi-Fi 5)
ACCESSIBILITY
High Contrast
Yes
Gray Scale
Yes
Invert Colors
Yes
DIMENSIONS AND WEIGHTS
TV Dimensions without Stand (WxHxD)
1228 x 708 x 45.9
Packaging Dimensions (WxHxD)
1360 x 810 x 172
Packaging Weight (kg)
19.5
TV Dimensions with Stand (WxHxD)
1228 x 772 x 235
TV Stand (WxD)
1057 x 235
TV Weight without Stand
14.3
TV Weight with Stand
14.5
VESA Mounting (WxH)
300 x 200
EAN CODE (BARCODE)
EAN Code (Barcode)
8806096172704
POWER
Power Supply (Voltage, Hz)
AC 100~240V 50-60Hz
Standby Power Consumption
Under 0.5W
ACCESSORIES INCLUDED
Remote
Magic Remote MR24
Power Cable
Yes (TV Attached)
Remote Control Batteries
Yes (AA x 2)
COMPLIANCE INFORMATION
Summary

- Clearer sound and picture with refinements by the alpha 8 AI Processor 4K.
- Infinite Contrast for crisp visuals with dark blacks and bright whites.
- Enjoy upgrades for up to 5 years with webOS Re:New Program.
- Always ideal audio from AI Sound Pro.
- Immersive 2.1ch surround sound.
- Partial refund is not available.
Key Spec
General - Number of Channels
2.1
General - Output Power
300 W
Dimensions (WxHxD) - Main
720 x 63 x 87 mm
Dimensions (WxHxD) - Subwoofer
171 x 320 x 252 mm
All Spec
SOUND EFFECT
AI Sound Pro
Yes
Standard
Yes
Cinema
Yes
Game
Yes
AUDIO FORMAT
DTS Digital Surround
Yes
AAC
Yes
Dolby Digital
Yes
CONNECTIVITY
HDMI Out
1
Bluetooth Version
5.3
USB
1
Bluetooth Codec - SBC/AAC
Yes
Optical
1
HDMI SUPPORTED
Audio Return Channel (ARC)
Yes
CEC (Simplink)
Yes
CONVENIENCE
Remote App - iOS/Android OS
Yes
Soundbar Mode Control
Yes
TV Sound Mode Share
Yes
WOW Interface
Yes
DIMENSIONS (WXHXD)
Main
720 x 63 x 87 mm
Subwoofer
171 x 320 x 252 mm
WEIGHT
Main
1.65 kg
Subwoofer
4.2 kg
Gross Weight
7.6 kg
ACCESSORY
Warranty Card
Yes
Remote Control
Yes
BARCODE (EAN CODE)
Barcode (EAN Code)
8806098768523
GENERAL
Number of Channels
2.1
Output Power
300 W
Number of Speakers
3 EA
POWER
Power Off Consumption (Main)
0.5 W ↓
Power Consumption (Main)
22 W
Power Off Consumption (Subwoofer)
0.5 W ↓
Power Consumption (Subwoofer)
35 W
GENERAL_PDR
The security update is supported for
2 years from the product launch date stated at https://lgsecurity.lge.com/bulletins/avproducts
COMPLIANCE INFORMATION
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